1331446140 has 48 divisors (see below), whose sum is σ = 4142278560. Its totient is φ = 355052160.

The previous prime is 1331446133. The next prime is 1331446163. The reversal of 1331446140 is 416441331.

1331446140 is a `hidden beast` number, since 1 + 3 + 3 + 1 + 44 + 614 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1232281 + ... + 1233360.

It is an arithmetic number, because the mean of its divisors is an integer number (86297470).

Almost surely, 2^1331446140 is an apocalyptic number.

1331446140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331446140 is an abundant number, since it is smaller than the sum of its proper divisors (2810832420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1331446140 is a wasteful number, since it uses less digits than its factorization.

1331446140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465659 (or 2465651 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1331446140 is about 36488.9865575902. The cubic root of 1331446140 is about 1100.1228898517.

Adding to 1331446140 its reverse (416441331), we get a palindrome (1747887471).

The spelling of 1331446140 in words is "one billion, three hundred thirty-one million, four hundred forty-six thousand, one hundred forty".